[toxik]

Sounds like Simulink to me, which is one of the major MATLAB programming environments.

ETA: Apparently MathWorks has Simscape in this category.

[sampo]

And Mathematica has this: https://www.wolfram.com/system-modeler/

[anothertroll123]

Yeah but that's a Modelica compiler and environment too.

[anothertroll123]

I would love to use Modelica but in my field Simulink is king